Cecidmoyia sp. [tentatively associated with the undescribed galls on Ulmus alata]
Ulmus
Oval, brown leaf spots, diameter 1/8 inch, midge, spring
”- EP Felt: (1940) Plant Galls and Gall Makers©
Reference: https://babel.hathitrust.org/cgi/pt?id=wu.89041294323&view=2up&seq=242&skin=2021&size=150&q1=ulmus